Patent US3729256A successfully refreshed from Google Patents.
US3729256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembly for polymeric dispensing
Assignee: WR Grace and Co Conn
•
Filing: 1971-01-18
•
Granted: 1973-04-24
•
Expires: 1991-01-18
Abstract
Abstract The invention disclosed is for an assembly useful for storing and dispensing a liquid photocurable composition. The assembly for storing and dispensing includes a storage chamber for a liquid photocurable composition which is in flow communication with a dispense chamber having a reciprocably slidable piston therein for effecting volume displacement and dispensing of the liquid composition. The piston selectively effects transfer of liquid composition from the storage chamber into the dispense chamber and, upon reverse actuation, it selectively effects dispensing onto a support surface. The photocurable composition may be thus dispensed onto the support surface, after which it is spread into a layer for exposure to actinic light in selective photocuring.
Inventors
- 👤 W Westfall
- 👤 D Kramm
- 👤 M Sanchez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:41
CPC Classifications
G; G03; G03D; G03D13/00; G03D5/00; G03D5/04; G03F; G03F7/00; G03F7/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
201 words
An assembly which comprises in combination: a. a moveable carriage; b. means for reversibly moving the carriage over a work area in combination with a photocomposing apparatus, said work area adapted for receiving thereon a liquid photocurable composition, and said apparatus having means for selectively exposing a layer of said composition to radiation for photocuring; c. a first chamber adapted for storing liquid photocurable composition, said first chamber having means for receiving the composition and having an opening through a wall of the chamber for transferring the composition from the chamber; d. a second chamber adapted for controllable flow communication with the first chamber in receiving composition to be transferred from the first chamber, said second chamber having a hole through a wall thereof for dispensing the composition to the work area; e. receive-dispense means for selectively receiving the composition from the first chamber into the second chamber and for selectively dispensing the composition from the second chamber to the work area, said receive-dispense means including a reciprocably slidable piston received in the second chamber; f. means for reversibly sliding said piston; and g. housing means for housing said first chamber and said second chamber, said housing supported by said carriage.
Claim 2
Dependent Claim
201 words
An assembly which comprises in combination: a. a moveable carriage; b. means for reversibly moving the carriage over a work area in combination with a photocomposing apparatus, said work area adapted for receiving thereon a liquid photocurable composition, and said apparatus having means for selectively exposing a layer of said composition to radiation for photocuring; c. a first chamber adapted for storing liquid photocurable composition, said first chamber having means for receiving the composition and having an opening through a wall of the chamber for transferring the composition from the chamber; d. a second chamber adapted for controllable flow communication with the first chamber in receiving composition to be transferred from the first chamber, said second chamber having a hole through a wall thereof for dispensing the composition to the work area; e. receive-dispense means for selectively receiving the composition from the first chamber into the second chamber and for selectively dispensing the composition from the second chamber to the work area, said receive-dispense means including a reciprocably slidable piston received in the second chamber; f. means for reversibly sliding said piston; and g. housing means for housing said first chamber and said second chamber, said housing supported by said carriage.
Claim 3
Dependent Claim
122 words
The assembly of claim 1 wherein said assembly has start-dispensing control in response to actuation of a first control element actuatable by action of the assembly when the assembly is moving forwardly in a first zone by having a spout over a support sheet location preselected to receive a first-dispensed portion of the composition, and control means for continuing the dispense operation as the assembly continues forwardly leaving said first zone, and stop-dispensing control in response to actuation of a second control element actuatable by action of the assembly when the assembly is moving forwardly in a second zone by having the spout over a second location on the support sheet, said second location preselected to receive a last-dispensed portion of composition.
Claim 4
Dependent Claim
63 words
The assembly of claim 2 including electronic speed control means for controlling speed of a first reversible variable speed motor provided for driving the carriage, and including a second electronic speed control means for controlling speed of a second reversible variable-speed motor in preselected speed synchronization with speed of the first motor, said second motor being provided with means for driving the piston.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |